An impregnation process of a porous support, comprising the following steps: 1) preparation of an aqueous colloidal dispersion of thermoplastic (per)fluorinated polymers; 2) a) concentration or dilution of the dispersion obtained in 1) ; b) optional surfactant addition to obtain a dispersion having…

Porous hydrophilic membranes comprising a porous inert support on which an ionomer is deposited, said membranes being characterized in that they have an ionic conductivity and a water permeability higher than 1 l/(h.m.Atm).

Electrolytic compositions comprising a perfluoropolyether additive of formula (I): wherein: d,e,f are integers; a,b,c can be zero or integers; being a+b+ c+d+e+f such that the number average molecular weight ranges from 500 to 5x10; T are end groups -CF2X (X=F,CF,Cl), -CF, -CF(CF)COO (1/n)M, -CFCOO…

Sulphonic fluorinated ionomers crosslinked by radical crosslinking of: A) crosslinkable sulphonic fluorinated ionomers, having equivalent weight 380-1300 g/eq and comprising: from 48% to 85% by moles of monomeric units deriving from tetrafluoroethylene (TFE); from 15% to 47% by moles of fluorinated…